Composition for paint



UNITED STATES PATENT OFFICE.

DARIUS S. ROBINSON, OF CLEVELAND, OHIO, ASSIGNOR OF ONE-HALF TO HARRISONE. GILMORE, OF MINNEAPOLIS, MINNESOTA.

COMPOSITION FOR PAINT.

SPECIFICATION forming part of Letters Patent No. 421,360, dated February11, 189i).

' Application filed May 28 1889. Serial No. 312,446. (No specimens.)

To all whom it may concern.-

Be it known that I, DARIUS S. ROBINSON, of Cleveland, in the county ofCuyahoga and State of Ohio, have invented a certain new and usefulComposition for Paint and Analogous Purposes; and I do hereby declarethe following to be a full, clear, and exact description of theinvention,such as will enable others skilled in the art to which itpertains to make and use the same.

My invention relates to a new composition of matter designed moreespecially for paint. The composition consists of the followingingredients and preferably in about the proporiions given, to wit: Fivepounds pulverized slate-stone, one pound rosin, one and one-half quartscrude hydrocarbon oil, one pint raw linseed-oil, one pint Japan drier.The rosin is melted and the ingredients thoroughly mixed, the resultbeing a liquid of about the consistency of ordinary paint, adapted to beapplied as a paint or coating for walls, ceilings, roofs, &c. Thecompound when dry is hard, durable, and susceptible of high polish, andis well adapted for black boards. It is impervious to moisture, and isessentially non-combustible, and consequently should be classed as afire-proof paint.

If a very thin coat is required,the compound may be made thinner byincreasing the quantity of the oils, or by reducing the quantity ofpulverized slate-stone. If a heavy coat is requiredfor instance, tocover walls, ceilings, &c., in place of the ordinary hard finishuse morepulverized slate-stone, to make the compound plastic rather than liquid,in which case it should be applied with a trowel or other similar toolrather than with a brush. Difierent coloring-matters may be added,ifrequired.

That I claim is- A new composition of matter, consisting of pulverizedslate-stone, rosin, crude hydrocarbon oil, linseed-oil, and Japan drier,mixed and in approximately the proportions given, substantially as setforth.

In testimony whereof I sign this specification, in the presence of twowitnesses, this 27th day of March, 1889.

DARIUS S. ROBINSON.

Witnesses:

CHAS. 11. Donna, GEo. W. KING.

